Project description:Purpose： The goal of this study is compare the effect of glnA gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of glnA in Agrobacterium sp. CGMCC 11546. Results: The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔglnA mutants may be caused by the insufficient supply of energy ATP conclusion: glnA play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Purpose： The goal of this study is compare the effect of phbC gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of phbC in Agrobacterium sp. CGMCC 11546. Results:The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔphbC mutants may be caused by the insufficient supply of energy ATP conclusion:phbC play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Purpose: The goal of this study is compare the effect of MetH and MetZ gene in curdlan synthesis in Agrobacterium sp. CGMCC 11546. methods: The transcriptional and metabolomics analysis the function of metH and metZ in Agrobacterium sp. CGMCC 11546. Results: The transcriptional and metabolomics showed that the decrease of curdlan production in the ΔmetH and ΔmetZ mutants may be caused by the insufficient supply of energy ATP conclusion: MetH and MetZ play an important role in curdlan synthesis in Agrobacterium sp. CGMCC 11546
Project description:Organisms utilize sophisticated neurocircuitry to select optimal food sources within their environment. Methylobacterium is a lifespan-promoting bacterial diet for C. elegans that drives faster development and longevity, however after ingestion, C. elegans consistently choose any other food option available. A screen for genetic regulators of the avoidance behavior toward Methylobacterium identified the AWB and AWC sensory neurons and the odr-1 guanylate cyclase expressed exclusively in those four ciliated neurons as mediators of the antipathy response. Metabolic profiling of the Methylobacterium diet reveals a macromolecular profile enriched in saturated fats and here we show that C. elegans sense and integrate signals related to the type of ingested lipids that subsequently cues food-related behaviors. Moreover, disruption of endogenous lipid metabolism modifies the intensity of antipathy toward Methylobacterium which suggests that the current state of lipid homeostasis influences food preference. Enhanced expression of the sphingolipid degradation enzyme Saposin/spp-9 enhances antipathy behaviors and activation of the sphingosine rheostat and more specifically modulation of the bioactive lipid mediator sphingosine-1-phosphate (S1P) acts as a signal to promote avoidance of Methylobacterium. Taken together, our work reveals that C. elegans modify food choices contemporaneously based on the availability of dietary lipids and the ability to metabolize dietary lipids.
Project description:Organisms utilize sophisticated neurocircuitry to select optimal food sources within their environment. Methylobacterium is a lifespan-promoting bacterial diet for C. elegans that drives faster development and longevity, however after ingestion, C. elegans consistently choose any other food option available. A screen for genetic regulators of the avoidance behavior toward Methylobacterium identified the AWB and AWC sensory neurons and the odr-1 guanylate cyclase expressed exclusively in those four ciliated neurons as mediators of the antipathy response. Metabolic profiling of the Methylobacterium diet reveals a macromolecular profile enriched in saturated fats and here we show that C. elegans sense and integrate signals related to the type of ingested lipids that subsequently cues food-related behaviors. Moreover, disruption of endogenous lipid metabolism modifies the intensity of antipathy toward Methylobacterium which suggests that the current state of lipid homeostasis influences food preference. Enhanced expression of the sphingolipid degradation enzyme Saposin/spp-9 enhances antipathy behaviors and activation of the sphingosine rheostat and more specifically modulation of the bioactive lipid mediator sphingosine-1-phosphate (S1P) acts as a signal to promote avoidance of Methylobacterium. Taken together, our work reveals that C. elegans modify food choices contemporaneously based on the availability of dietary lipids and the ability to metabolize dietary lipids.
